Industry's first 1000 watt DE HPS compatible magnetic core and coil ballast. Exposed ballast design is compact and runs cool! Hard Core? DE offers superior cooling capabilities while extending the longevity of the capacitor and ignitor. Dual universal lamp cord receptacle is compatible with all Sun System? brand DE reflectors as well as other branded DE reflectors. Our Hard Core? Double-Ended ballast with dual input voltage easily switches from 120 to 240 volt power! Simply unplug detachable 8 foot 120 volt power cord (included), turn power plate around for 240 volt power and plug in a 240 volt power cord (240 volt power cord sold separately, Part #903082). Powder-coated steel housing with louvered venting and solid design helps protect internal components. Rubber feet reduce noise and vibration. Excellent ballast quality with high temp 150?C wire connections will provide years of trouble-free operation. For use ONLY with 1000 watt double-ended HPS lamps. Do NOT use with other wattages or lamp types.